html, body {
    width: 100%;
    height: 100%;
}

#headbox {
    margin-top: 5%;
    height: 15%;
}

.container {
    margin: auto;
    height: 100%;
    text-align: center;
}

.content {
    border-radius: 15px;
    margin: 10px auto 0;

    padding-top: 1px;
    /*padding-bottom: 30px;*/
    height: 50%;
    width: 70%;
    background-color: #faf1f2;
}

#balance {
    color: #4CAF50;
    font-size: 30px;
    font-weight: bold;
}

#headbox2 {
    height: 10%;
}

.input {
    border-radius: 15px;
    font-family: "Roboto", sans-serif;
    /*轮廓*/
    outline: 0;
    background: #aaf2a3;
    text-align: center;
    font-weight: bold;
    /*width: 100%;*/
    border: 0;
    margin: 0 0 15px;
    padding: 15px;
    box-sizing: border-box;
    font-size: 14px;
}

#tip {
    display: none;
    color: red;
}

@keyframes toMin2 {
    0% {
        opacity: 0;
        font-size: 10em;
    }
    100% {
        font-size: 2em;
        opacity: 1;
    }
}

#username {
    font-weight: bold;
    font-size: 2em;
    animation: toMin2 0.7s;
}
#balance{
    font-size: 3em;
    animation: toMin 0.7s;
}